Agency, causal structure and locality in Qbism

          @misc{ scivideos_PIRSA:15050074,
            doi = {10.48660/15050074},
            url = {https://pirsa.org/15050074},
            author = {Schack, Ruediger},
            keywords = {Mathematical physics, Quantum Foundations, Quantum Gravity, Quantum Information},
            language = {en},
            title = {Agency, causal structure and locality in Qbism},
            publisher = {Perimeter Institute for Theoretical Physics},
            year = {2015},
            month = {may},
            note = {PIRSA:15050074 see, \url{https://scivideos.org/pirsa/15050074}}
          }
          

Abstract

In QBism, a quantum state represents an agent's personal degrees of belief regarding the consequences of her actions on any part of her external world. The quantum formalism provides consistency criteria that enable the agent to make better decisions. QBism thus gives a central role to the agent, or user of the theory, and explicitly rejects the ontological model framework introduced by Harrigan and Spekkens. This talk addresses the status of agents and the notion of locality in QBism. Our definition of locality is independent of the assumption of an ontological model. Instead it depends on an appropriate formalization of the idea of a causal structure.